无贫化放矿在金刚石矿山中的应用  

Application of Non-dilution Ore-drawing Method in a Diamond Mine

作　　者：张海峰[1] 池秀文[2] Zhang Haifeng;Chi Xiuwen(Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan 430070,China;School of Mineral Resources and Environmental Engineering,Wuhan University of Technology,Wuhan 430071,China)

机构地区：[1]中国科学院武汉岩土力学研究所,湖北武汉430070 [2]武汉理工大学资源与环境工程学院,湖北武汉430071

出　　处：《矿业工程研究》2018年第3期32-36,共5页Mineral Engineering Research

摘　　要：在无底柱分段崩落法中,现行截止品位放矿没有考虑矿岩移动空间的连续性,不利于矿产资源的合理开发与利用.以某金刚石矿为研究背景,采用颗粒流法建立数值模型,对无贫化放矿和现行截止品位放矿2种放矿方式进行对比.试验结果表明:无贫化放矿在保持矿石总回收率基本不变的情况下,可大幅降低废石混入率,放矿效果最好;对于处于开采初期的矿山,在多个分段矿岩移动空间完备的情况下,采用无贫化放矿方式最为合理.In the non-pillar sublevel caving method, the current cut-off grade ore-drawing method does not consider the continuity of the ore-rock movement space, which is unfavorable to the rational exploitation and utilization of mineral resources. In this paper, taking a diamond mine as the research background, the particle flow code PFC is utilized to establish a numerical model to compare the advantages and drawbacks of the two types of ore-drawing methods, i.e. non-dilution ore-drawing, and current cut-off grade ore-drawing. The test results show that, under the conditions of keeping the total recovery rate of the ores unchanged, non-dilution ore-drawing can greatly reduce the mixing rate of the waste rocks, showing the best ore-drawing effect. For the mine at the initial stage of mining, it is most reasonable to adopt the non-dilution ore-drawing method in case of the complete movement space of the ores in several sublevels.

关 键 词：无贫化放矿 现行截止品位放矿 回收率 颗粒流法 

分 类 号：TD801[矿业工程—矿山开采]